Control valve for compressed air brakes



Feb. 12, 1929, 1,701,905

A. ANDERBERG ET AL CCNTROL VALVE FOR COMPRESSED AIR BRAKES Filed Oct. 1'7, 1927 2 Sheets-Sheet 1 6M ii l 9 :x Il l a I y l, l: W C f, y ff" y//// /mf FeAb. Z, 1929. .1,701,905

A. ANDERBERG x-:T A1. GONTROL VALVE FOR GMPRESSED AIR BRAKES Filed Oct. 17. 1927 2 Sheets-Sheet 2 J lvzg Patented Feb. l2, 1929.

sfrA'rEs ANDERS ANDERBERG AND ERIE ANDERS ANDERBERG, CFpMALMO, SWEDEN.

CONTR/0L VALVE FOR COlliIPRESSED AIR BRAKES.

Application filed October 17, 1927, Serial No. 226,755, and in Sweden September 3, 1927.

Single-chamber compressed air brakes are still in common. use and it is etten desired to replace the same by newer andmore modern brake systems, which lately have been more and more adopted, and in which a two-chamber air brake or a modification thereof is included. lt is also desirable of course that the substitution referred to be eilected with so small a change of parts as possible, or in other words in such a manner that details at hand in connection with the single-'chamber brakes be used to the greatest possible extent in connection with the brake system oi' other kind intended to replace the former, in order to minimize the costs 'for the alteration as far as possible.

As far as pipings, air reservoirs, couplings, stop valves and the like are concerned, the substitution may be eliiected with little or no change in their mounting on the rolling stock, but there is a rather costly device commonly used in connection with bra-ke systems which cannot be transferred directly from one brake system to another, this device being the control valve or triple valve.

In the lcase of two-chamber air brakes or combined brakes of long-known types, it is not possible to alter the control valve in such a way as to adapt it tor use in connection with the new brake system, if the single-chamber brakes previously at hand are to be replaced by such bra-kes; so that the control valve at hand must be replaced by another control valve far more complicated and costly. On the other hand, if the brakes at hand. i. e. the single-chamber brakes, are replaced by the combined brake referred to in our prior Patent No. 1,663,579, granted March 27, 1928, or another simple or combined brake system, which for its operation requires an arrested controlling member, it will be possible merelhv by a slight modification ot the control valve already at hand to adapt the saine for use. in the new and substituting brake system, this modification as a whole being' so simple. that its cost will be only a small fraction of the cost of a completely new control valve, especially if the same must be of such a complicated nature is required in connection with the older combined brake systems.

Thus. the present invention mainly intended for use in connection with such modiied two-chamber brakes as are described 1n our said patent; but 1t 1s not to be understood v that the invention cannot be applied with the same advantages to other brake systems, on condition, however, that the latter to perform their function require an arrested controlling member.

For the purpose of adapting a common control valve or triple valve, as used for singlechamber brakes, for use in connection with two-chamber brakes such as disclosed in our patent or the like construction, it is only nec- Y essary according to the invention to combine the common slide that serves as a control member with releasable means for arresting said slide in both oi' its end positions and to arrange a flexible connection between the .same and its actuating piston in such a manner that the slide cannot take any other position than either of the end positions.

These slight modifications in the construction of commonly used control valves for single-chamber brakes may be eiected at a very small expense by means of a slight alteration of the slide and the provision of an additional arresting means, which may easily be mounted on the valve.

ln order to give a full explanation regarding the modifications required, the accompanying drawings, illustrating` the invention, show in Fig. 1 a commonly known type of control valve' for single-.chamber brakes seen in vert-ical section, and Fig. 2 in the same manner shows the same valve modified according to the invention. The valve shown in F ig. 1 (with minor mod iiications having no in'liuencc at all on the principle of operation) is now used in all of the known single-chamber brake systems and it may thus, at least in the parts having anyconnection with the invention, be considered as characteristic' of all singlechamber brake systems, even if the constructional parts may diii'er alittle in diierent cases. Figs. 1EL and lbshow diagrams of the slide ports and cavities, and the corresponding ports or openings in the surface whereon the slide travels,iwhich latter ports coact with the former, and lFigs. 2a and 2b in the same manw ner showr the same features modified according to the invention. At iirst sight it will be evident from the drawings that the diii'erino cylinder cylinder chainber only) and a third boss l The known Vcontrol another'boss for connection to the brake (single-chamber brakes have one for connection to the auxiliary air reservoir.

` Furthermore the control valve is always provided with a slide valveintended for et ecting a connection eitlier'between the brakeV pipe and the brake cylinder, i. e. betweenthe VbosesQ and', or between the auxiliaryair reservoir, and the brake cylinder, 1. e. between thebosse's 3 and.v 4, this slide valve being actin ated by a control piston 6. One side oli this piston is acted on by the pressure within the brake n )e fthe-boss 2 and the otherside is acted on by. the .pressure Within the auxiliary actswith a feed groove 7 and in connection with the saine serves as a valve between the Vlirake pipe and the 'auxiliary` airreservoir,

'9 in an elongated slot when the limitsfor the lost inotion are reached. .'lhe said actuating means are removed according to the invention i end they are replaced by (springs between the, slide and thepiston rod as more fully eX- A Y case'the difference between the new slide and the old one may perhaps be a -little'greater plained below.

moderncontrol valves of this type, according Vto 1V sslsov combined with a cock 10 which n'ialybe .turned into three di Herent po- Ysitions, of which: f

Position l is for ordinary braking or single action, whereby coinpre'ssediairfrom the oUV ,ili'aiifiiigs coi l scribed above, and .the function of the con,-

trolvalye is so ii'ell known that Vit seenisiiiiiV necessary to explain itinere 'lfiillyfiii tl'iis/ conauxiliary reservoir-may be introducedlinto the brake' cylinder by means of the slide 5.

Position `ll is for quick v action Yor einer- ;rency braking, lwhereby the. pressure in thev brake pipe .-inay also be introduced directly into the brake cylinder by` unseating the non 'return valve 11. and I' Y f Y Position lll is :i cut off or closed position, 1 wherein the control vali/'e as a'ivhole, by closing oi, vthe .cork 10is completely cut 'off sov that `the brakesare set out ofaction.`

Thepositini oiithecock 10 shown in the ooiids `to position Il as denection.

According to Ythe invention the actuating ineens between thefpiston rod and the slide Tare removed as aforesaid, ,and the y'. are replaced by springs i12 and 13, the spring'l being inserted be `veentlie slide and thepiston Bandthe spring lbetween Vthe slide Vand f anV abutment-'14e arranged kon `the piston rod. .Q `rAlsoin this case an interspace 15 is vproduced ,which permits th `pist/onto more a certain distance" before" 'compressing the spring` Vle valve, `as well as all an ltliis function will cai se and the lost motion lthus obtained likewise corresponds to a. closing ofthe feed groove 7 The slide 5 is releasably arrested in both ol its end positions, and in the construction shown Vinthe drawing the arresting ineens consists. ot a pin 16 having a spherical head acted upon by aspring 17 Vwhich presses it against `the slide for coaction with correspending Vrecesses 18 andlSa'arranged in said slideHV "he arresting ineens as a wholeis enclosed within a Ytube-like housing 19 and as a single unit it may be screwed Vinto a ,hole

Athrough that part of the valvehousing surrounding the slide, VHence it will be evident that Jthis constriictional Vdetail may easily be arranged on the valve housing and, moreover, Ythat the alterations needed are limited Vto ii slight modification of the slide as will at once niiinnor described above-and shown in theV ',dinwings,should prefer to produce a lcoin- )letel7 new slide constructed accordino' to the invention, an alteration of such a kindV is'also included in the inifentioii-4` lnsuch ifhanithe Adiilerences shown in the drawings,

"but the difference in cost lfor the alteration is smalll and vwithout importance.

rlherrecess 18, correspondingrto a Vbrake 1 positiono1c the valve, inay beV alittle deeper thanthe Yrecess 18 Correspending` tothe rebrakes neednot be so great as the diiierence in pressure Jfor releasing' theni;

TWhen the control valve is iised,-either of the springs 12 or 13 must of course be coinpressed to adegree siii'licient for releasing` the slide Ynieves at all, theslide to niove rai, ly and accurately, scthatit is thus preariestingnieans before t rented troni tal-.ring` any inteiiiiediiito posiifs-tween the two en d positions.`

Y Iiat tliearresti niea'nsiiecd ity be constructed iii the lorin y 'sy vii'y considerably the niiiin point being ,iply thata'releasable arresting,operationoccurs in both ol" .thev end positions Vot the slide.'

ln Figs. 1"; and, 1V the 1full li'nessliofiv'the ,outline and tlieports of the supporting siiror for the slide valve, and the ports d caviL esin trie sli-denare shown vni dotted rines. 'ln order to permit the slide-to act in `the',manner desired .according to Figjl` it shonld'be able to take three different posi- Vlease position in order to inake the arrestingV` :t'orce a little stronger inthe former position il i) tions, ille position elioivo iii Fie responding; o :L quick-avion braking. liie tliird position is im intermediate one3 corre4 el. 'llie slide ie eieo provided with e third Clieimel f/ which is iorii'iefl and by iiieoiie llow. oii eoiieideriiig lli la, it- Wi ll be Seen that the slide tek-es o poe1 m. for iiiter-eoii Neotion oli tl e porte 1,4 ziiiil o by means of tile elmmiel e. whereby tbe broke eylieder ie ooooeeted to the otii'ioepliere zuid the Slide posi tion thus eorieepoiids to release position the brakes. li the Slide. by decrease ol pres- .Ciure in the broke pipe. is pushed to tlie position shown in Figi'. lb the Cavity f will cow met. tbe pi rte c and whereby tbe] relie pipe is; directly connected (by the noirreturii Valve ll) to tlie b like cylinder, the position time corresponding to o qiiiel-ziotioii brel;- iiiej. Furthermore, the Slide Valve may take Jbe tliirzl position referred to above.. Whereiii tire pori; g coincides with the port l), zuid tlleii the bre-.ke o), ieder, for the purpose ol single-action brziliiio' is oonneeted with tlio auxiliary oir rese ".f'oii'. 'lb is third position notr pieeeut iu lille iiiodilied construction :md tbe slide een only tele either oil tbe end positions, but ueverlnlielese the siiiogle-ou tion, braking' may also be otl'eetef :Recording to the iei'eiitioi 7 iis; will be wml-.lined below.

lo oi':.er to poi-init tbe eli@ to tok-e o position bolli. i'oi' single-zielen :md lor piek- Heiloo brdlrire ille ebiiiiiel f io lligrel. end

.. 1 1 ,I 1 f... i o luemzimiw j m il io.

l." :md ll. ie eoineii'li it i-loogrsled (lo the lei'i. iii tbe d 'airing-S) so trial io. tbe end position iii Figi. i2. ii'liieli eorreepoml to zi breliiiig; elf ooe liiiul oi' oiiotlie'. it will always connect tbe ports f." and o1 (eorr epoiidingg to l ond o iii Figs. la and lb) eo that it will depend oo li be position ol? tlio Coeli l() Whether tbe singleeetioo or the quioloiiotion will trike plziee. Beyond tl'iie en ell iiodiliootioo (elongation of tbe channel all of lie elieimels end ports both in the slide itself :1L-.fl iii ite supporting; Surface or Seat are il emile as described in eoimeotion with Figs. and lb, and the seme eubjeoted at one side to the air pressure in reference numerals are used ou eorreepooding' ports with the only dlliereiiee that the iiiiiiiorals in Figs. 2a zmdb are primed.

'lt -.Till be obvious that the elongation of ille eue. ,L eescri )ec o. ove n Coline 'o l l l l l lo 1 e t1 n with lille invention is to be used only when altering' :iii old slide, but it the old Slide is relzieed by new Such no elongation of elles-imei may be displaced only (to the left) :i dfetmioe Sullioieiit for obtaining the 'desired connection between the porte .c ood as rivise the channel `,i'f elongated, would 'e on iii'iiieoeesoiy length Wliioli is not required lor the fuiietioo.

From the 'lorego'iig it will thus be uiider- Stood thet- 'lie Control valve3 iii spite ol tlie alterations according to elle invention and of the tout that the Slide can lieke two positions only iiieteod of three zis'previously, will not beve :my reeizrieted function, and that. it muy be used :isi well for eiligle-eetioo braking ood l'or quieloaotion braking es for cutting oil the breliee :is ai whole iii the Seine inwoner is b-rlvoro :ind Siiilply by means o'l1 o turning: ii'ioi'eoieiit of the oook l0.

llliot We claim and desire to Secure bv Lettere Patent 1- U l. El control "zilve for ei'figl-e-cliziiiiber coinpreeseff air b Tikes, Comprising o easing. lieving means for Connecting its nntf-rior with e mein broke pipe, e. b 'alie elfliiider zuid en ziiixiliorv7 air reservoir; :i slide ii 1i lz blisl1 ing inter-Connection between the br; ke pipe, the broke Cylinder and the oir re ""Voir. e piston for Controlling' the iiioveieents of tbe slide the brake pipe and at lie Vother side tf` the air pressure in the reservoir; e lostaiiotioii iwi-eosiiiiseioii connection bet-Ween tliepioton end tbe slide; and means for arresting the 'il in either of its two end positions, one et wb.. li ooi-responde' to brake-rele: Se and connect :i me brake Cylinder with atmosphere, iif'liiie lille other corresponds to bralieeettimg and eoli- 'iieete the brake cylinder simultaneously with the ir reservoir and the broke pipe. f 2 A control valve,y according to Claim l, in

-iroel paiseoge for eomieetinp; tbe broke pipo md .b1-olie eli'liiider; :md iii wliieli o. tbreevoelt is rotatably iimiioled in .web piase to Glorie lie reime :il will 'li'rcwpeel'iie oil? ine pofsitioii i t' slie Slide nml o tbe eoooeeiioii liietweeii tbe :iir reservoir :1nd ilse brillos cylinder.

3. A. control `volvo for single-chamber oompressed oi brakes, eoiiiprieing a. easing. lieving menne vfor Connecting' its interior Vith e iiiziiii broke pipe, :i broke Cylinder and on eimiiliery air reservoir; e Slide lforeeteblisli.- ieg intereo1iiieetion between tlie broke pipe, tlie b elle Cylinder and the oir reservoir; i pistou for controlling' the movements ol the Slide subjected et one Side to the oir pressure io the brake pipe' :ind et the other sidoto the eii pressure in the reservoir spring tiansinission connections between the piston :1nd the slide and enabling e lost-motion movement of the former; and inea-ns for arresting the slide in 'eithei of its two end positionsE one ofwliich v corresponds to brake-release and connects the Y e brake cylinderV with atinospheie, While Vthe other 'corresponds tocbizilte-setting und connects the brake cylinder lsiinuit-sneously .with the zur reservoir and the hi'eke pipe.

e.` A'conti'olvelve for single-clieinlici c -i pressed nii brakes?.compisingu casing?, inwing means foii connecting its interiorl with e meinhrake pipe, e lun/lie cy'lindeiend en auxiliary en' ieseivoii'; a slide foi' establishing mteiconnnect1on between the brake pipe,

the brake cylinder end the air reservoir; e

' piston for contiollingtheinoveinents of the slide subjected et one side to the eiipiess fe in the brakepipe :uid et the other side to the air pressure in the resei'voii'; e lost-motion transmission connection hetween'the piston andthe slide; and e spring-leaded device for arresting the slide in either of its two end positions, 'one of which corresponds to brake- Y release and conneetsthe'bieke cylinder with atmosphere, While the other corresponds to brake-setting end connects he brake cylinder simultaneously with the en' i'eseivon end the brake pi pe.

former; and av spring-loaded device foi ei'-j resting the slide in either of 'its twoendpositions, one ofwhich coiiesponds to hi"eikel-rre` lease and connects the bielie cylinder with zitinosphere, While Vthe other coi-responds to brake-setting and connects the brake cylin'dei simultaneously with the air reservoir and the bleke pipe.

the other side to the iii1 Y in testimony WhereoiiI we have signedoui' y naines to this speciiicetion, Y

iYNDEl-ES ANDERERG. 4 Y ERIK. ANDERS ANDERBERG 

